IOM said gang violence had forced more than 110,000 people to flee their homes in the last seven months, particularly in Gressier.
WHO has announced a spike in cholera in several regions of the world, with almost 195,000 cases and over 1,900 deaths reported in 24 countries.
Unlike previous jabs, the new meningitis vaccine is single-dose and protects against five strains of the infection.
Global cancer cases are expected to rise around 77 per cent by the middle of the century, UN health authorities said on Thursday.
The WHO spokesperson added that only 14 hospitals are still functioning in Gaza.
The organisation said it was “deeply disturbing” that some children were being used in the fighting.
